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PDF UP6281 Data sheet ( Hoja de datos )
| Número de pieza | UP6281 | |
| Descripción | 12V MOSFET Drivers | |
| Fabricantes | uPI Semiconductor | |
| Logotipo |  |
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uP6281
12V MOSFET Drivers with Output Disable
for Single Phase Synchronous-Rectified Buck Converter
General Description
Features
The uP6281 is a dual, high voltage MOSFET driver optimized
for driving two N-Channel MOSFETs in a synchronous-
rectified buck converter. Each driver is capable of driving a
5000pF load with 30ns transition time. This device combined
with uPI multi-phase buck PWM controller forms a complete
core voltage regulator for advanced micro-processors.
The uP6281 features adaptive anti-shoot-through protection
that prevents cross-conduction of the external MOSFET
while maintains minimum deadtime for optimized efficiency.
Both gate drives are turned off by pulling low OD# pin or
high-impedance at PWM pin, preventing rapid output
capacitor discharge during system shutdowns.
Other feature is supply input under voltage lockout. The
uP6281 is available in thermal enhanced PSOP-8L or
WDFN3x3-8L packages.
Applications
Core Voltage Supplies for Desktop,
Motherboard CPUs
High Frequency Low Profile DC/DC Converters
High Current Low Voltage DC/DC Converters
All-In-One Synchronous Buck Drivers
Bootstrapped High-Side Driver
Adaptive Anti-Shoot-Through Protection
Circuitry
1 PWM Signal Generates both Drivers
Tri-State Input for Bridge Shutdown
Output Disable Control Turns Off both MOSFETs
Under Voltage Lockout for Supply Input
PSOP-8L or WDFN3x3-8L Packages
RoHS Compliant and Halogen Free
Ordering Information
Order Number Package Type
Remark
uP6281ASU8 PSOP - 8L
uP6281ADD8 WDFN3x3 - 8L
Note: uPI products are compatible with the current IPC/
JEDEC J-STD-020 requirement. They are halogen-free,
RoHS compliant and 100% matte tin (Sn) plating that are
suitable for use in SnPb or Pb-free soldering processes.
Pin Configuration & Typical Application Circuit
BOOT
PWM
OD#
VCC
18
27
GND
36
45
UGATE
PHASE
GND
LGATE
PWM
Input
PSOP-8L
BOOT 1
PWM 2
OD# 3
VCC 4
GND
8 UGATE
7 PHASE
6 GND
5 LGATE
VCC
WDFN3x3-8L
1 BOOT UGATE 8
2 PWM PHASE 7
3 OD#
GND 6
4 VCC LGATE 5
VIN
VOUT
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F03, File Name: uP6281-DS-F0300
1
Free Datasheet http://www.Datasheet4U.com
1 page  
uP6281
Electrical Characteristics
Parameter
PWM Input
Input High Threshold
Input Low Threshold
PWM Floating Voltage
PWM Input Current
Output Disable Input OD#
Input High
Input Low
OD# Input Current
Propogation Delay Time
High Side Driver
Output Resistance, Sourcing
Output Resistance, Sinking
Output Rising Time
Output Falling Time
Propogation Delay Time
Low Side Driver
Output Resistance, Sourcing
Output Resistance, Sinking
Output Rising Time
Output Falling Time
Propogation Delay Time
Symbol
Test Conditions
PWMRTH
PWMFTH
PWMFLT
PWM = 0V
IPWM PWM = 5V
OD#H
OD#L
IOD#
TPDHOD#
TPDLOD#
OD# = 0V to 5V
RH_SRC VBOOT - VPHASE = 12V, IUGATE = -80mA
RH_SNK VBOOT - VPHASE = 12V, IUGATE = 80mA
TRUGATE VBOOT - VPHASE = 12V, CLOAD = 3nF
TFUGATE VBOOT - VPHASE = 12V, CLOAD = 3nF
TPDHUGATE VBOOT - VPHASE = 12V
TPDLUGATE VBOOT - VPHASE = 12V
RL_SRC VCC = 12V, ILGATE = -80mA
RL_SNK VCC = 12V, ILGATE = 80mA
TRLGATE VCC = 12V, CLOAD = 3nF
TFLGATE VCC = 12V, CLOAD = 3nF
TPDHLGATE VCC = 12V
TPDLLGATE VCC = 12V
Min Typ Max Unit
3.15
0.6
--
-420
1.0
3.45
0.9
2.0
-280
1.6
3.75
1.2
--
-140
1.9
V
V
V
uA
mA
2.6 -- -- V
-- -- 0.8 V
-1 --
1 uA
-- 20 45 ns
-- 20 45 ns
-- 1.2 2.4 Ω
-- 0.8 1.6 Ω
-- 35 45 ns
-- 20 30 ns
-- 40 65 ns
-- 20 35 ns
-- 1.2 2.4 Ω
-- 0.8 1.6 Ω
-- 35 45 ns
-- 20 30 ns
-- 40 65 ns
-- 20 35 ns
uPI Semiconductor Corp., http://www.upi-semi.com
Rev. F03, File Name: uP6281-DS-F0300
5
Free Datasheet http://www.Datasheet4U.com
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet UP6281.PDF ] | |
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